Attrition-mill grinding-disk-facing apparatus.



No. 783,406. PATENTED FEB. 28, 1905. h E. P. ALSTED.

ATTRITI ON MILL GRINDING DISK PAGING APPARATUS.

APPLICATION FILED APR. 20, 1903.

3 SHEETS-SHEET -l.

MW Qmwmm v AW,

N0. 783,406. PATENTED FEB. 28, 1905. i E. P. ALSTED.

ATTRITION MILL GRINDING DISK FACING APPARATUS.

APPLICATION FILED APR. 20, 1903.

3 SHEETS-SHEET 2.

a'wwkov. 5W 1? am QMMTAMMJU M No. 783,406. I PATENTED FEB. 28, 1905.

E. P. ALSTED. ATTRITION MILL- GRINDING DISK FACING APPARATUS.

APPLICATION FILED APR. 20, 1903.

3 SHEETS-SHEET 3.

NITED STATES Patented February 28, 1905.

FFICE.

PATE

ATTRlTlON-MILL GRINDING-DISK-FACING APPARATUS- SPEGIFICATION formingpart of Letters Patent No. 783,406, dated February 28, 1905.

Application filed April 20, 1903. Serial No. 153.412.

This invention relates to a portable appara- V tus for use of the milloperator for sharpening or regrinding the grinding-disks ofattrition-mills.

Many of the attrition-mills now on the market are of the type in whichthe disk-cases are movable longitudinally of the bed, whereby access tothe interior ofthe cases is obtained for repairing, for cleaning, forgrindingthe disk-faces, or for substituting new disks for those worn outor dulled.

As with the apparatus now on the market, with which I am familiar, it ispracticably impossible to properly sharpen or to regrind thecutting-faces of the grinding-disks while in place. It is now customaryinstead of resharpening or grinding the disks as they become dulled toremove the same and replace them by'newones. The expense involved inreplacing the dulled disks by new ones, includingthe cost of the disksand the labor, is considerable.

The object of this invention is to produce an apparatus by means ofwhich the grindingdisksof attrition-mills may be properly sharpened orground and resharpened or reground without removing said disks from themill.

A further object of this invention is to produce 'an apparatus as aboveoutlined which is in a nature portablethat is, an apparatus which may bemoved from one mill to another and attached to the several mills forperforming its function.

These and other objects I attain by means of the apparatus constructedas described in the specification and illustrated in the drawingspresented herewith.

As the mill itself does not enter into this invention and as thegrinding-disks of various types and makes of mills are adapted to beoperated on by this apparatus, only a portion of a mill is shown, saidportion being considered suflicient to clearly illustrate the mothsopermzdz' of the apparatus and the means for attaching the apparatus tothe mills.

In the drawings, Figure 1 is a plan view of this apparatus shownattach-ed to the front and rear disk-cases of an' attrition-mill, saidmill being shown in a fragmentary manner. Fig. 2 is a View insideelevation of this apparatus. Figs. 8 and A are cross-sectional viewsof this apparatus and are taken on lines 3 3 and 4. 4, respectively, inFig. 2.

Throughout the several views like elements are denoted by likecharacters.

The apparatus preferably consists of a bedplate or rod member 5,supported, by means of bolts 6, to yoke-irons 7, which in turn aresupported on horizontal bolts or screws 8, which are threaded throughears 9 of supports 10, carried on opposite sides of the front and rearcases 11 and 12, respectively, of the mill, said cases, together withtheir grindingdisks, being moved away one from the other andlongitudinally of themill-bed to allow the grinding apparatus to besupported between them.

J ournaled within boxes 13, carried by supports 14:, a distance abovebed 5 is a shaft 15, which is revoluble in said journal-boxes andmovable longitudinally therein. Aportion of said shaft 15, as at 16, isthreaded, and mounted on the threaded portion is a grinding or abradingwheel 17 preferably of emery or similar material. Double lock-nuts, asshown in the drawings, are threaded onto said shaft 15, two on eitherside of said abrading-wheel, whereby said wheel will be locked againstrotation, except with said shaft 15, as said shaft rotates in eitherdirection.

The outer end of shaft 15 carries a beltwheel or pulley 18, providedwith a wide beltface, as shown in Figs. 1 and 2, whereby said wheel maybe moved longitudinally with the shaft and still be driven by the beltwhich passes over it.

A screw-shaft 19, passing loosely through one of the supports 1 1, isjournaled at its outer end within a bearing member 20, carried by bed 5.Said shaft at its outer end is provided with a hand-wheel 21, .wherebythe same may be rotated. Theinner or threaded end of shaft 19 passesthrough a threaded eye in a yoked member 22, which is supported andguided on bed 5 by means of a guiding member 23, the opposite ends ofwhich project downwardly and lie on opposite sides of bed 5. Each of thearms of the yoke 22 loosely surrounds shaft 15, and inside of each armstops 24, in the nature of set-collars, are secured to shaft 15. It willbe seen from this construction that as screw-rod 19 is rotated, shaft 15will be moved longitudinally within its journals 13. Bolts 6, whichsecure the bed to the yokes 7 pass through slotted openings 25, and inorder to adjust the abrading-wheel into contact with the grinding-disks26 of the mill adjustment-screws 27 are provided. These screws arethreaded through depending ears of the yokes 7, and by means of them thebed 5 may be movedto and held in the desired positions. By means ofscrews 8, which are locked in adjusted position by means of locknutslocated on either side of cars 9, the shaft 15 and the abrading-wheelare adjustable laterally.

While the shaft 15 may be driven from any suitable power source, it hasbeen found dcsirable to drive the same from the main shaft 28 of themill, and as the two shafts 15 and 28 stand at right angles one to theother it is necessary to provide idler directing-pulleys for the belt29,by which the pulley 18 is driven from a pulley 30, carried by shaft28. These idler-pulleys are numbered 31 and 32, respectively, and areloosely mounted on a vertical shaft carried by a supportingbracket 33,which is preferably bolted to bed 5. The bracket 33 is provided withslots 34: for accomplishing the desired tension of belt 29.

After one of the grinding-disks of the mill has been refaced orsharpened the bed 5 may be adjusted to bring the abrading-wheel intoproper contact with the other grinding-disk, whereby it may be refaced.From the arrangement shown in the drawings it will be seen that theabrading-wheel and the grinding-disks of the mill will be driven inopposite directions when the grinding-disks are being refaced,and whilethus being driven the abrading-wheel may be moved across the face of thedisk to be reground at the desired rate of speed by the hand-wheel andscrew-rod. By inclining the bed 5 oflf of parallel from thegrinding-faces of the grinding-disks it will be possible to reface thegrinding-disks so that they are partially concave or convex, as isdesired.

It will be understood that while the drawings presented herewithillustrate a practical embodiment of this invention the invention is notlimited to the exact construction shown. Various changes may be made inthe apparatus for accommodating it to mills of various types and makeswithout departing from the spirit of this invention.

The bed member 5 is provided with a longitudinally-extending slot 35,(shown by dotted lines in Fig. 2,) and by means of this slot the bolt25, which passes through the same, may be moved longitudinally of thebed to accommodate mill-cases of Varying diameters.

Having thus described my invention, I claim 1. In an attrition-millgrinding-disk-facing apparatus, a pair of yokes adapted to connect theseparated disk-cases of an attrition-mill on opposite sides thereof, arod or bed-plate adj ustably supported by the yokes between thegrinding-disks, and a rotatable abradingwheel mounted on the rod orbed-plate and adjustable thereon across the face of one of thegrinding-disks.

2. In an attrition-mill grinding-disk-facing apparatus, a pair of yokesadapted to connect the separated disk-cases of an attrition-mill onopposite sides thereof, a rod or bed-plate slidably supported by theyokes, means for adjusting the rod or bed-plate with relation to eitherof the grinding-disks, and a rotatable abrading-wheel mounted on the rodor bedplate.

3. In an attrition mill grinding-disk-facing apparatus, a supportingmember, means for clamping said supporting member to the separateddisk-cases of an attrition-mill. on opposite sides thereof, means foradjusting said supporting member toward or away from one or the other ofthe grinding-disks of the attrition mill, a revoluble abrading membermounted on said supporting member and movable toward and away from theaxis of rotation of said grinding-disks, and means for rotating saidabrading member.

4. In a device offthe character described. yokes capable of beingclamped to the opposite sides of the opened disk-cases of anattrition-mill, a rod or bed-plate slidably supported by the yokes,adjusting-screws threaded in the yokes and bearing on opposite sides ofthe rod or bed-plate whereby the said rod or bedplate may be adjustedtoward either of the attrition disks, a rotatable abrading wheel mountedon the rod or bed-plate, and means for adjusting the abradingwheelacross the face of either of the attrition-disks.

5. In a device of the character described, yokes capable of beingclamped to the opposite sides of the opened disk-cases of anattrition-mill, a rod or bed-plate slidably supported by the yokes andadjustable toward either of the attrition-disks,a shaft slidablyjournaled on the rod or bed-plate, an abrading-wheel mounted on theshaft, and means for rotating and sliding the shaft.

6. In a device of the character described, yokes capable of beingclamped. to opposite sides of the opened disk-cases of an attritionmill,a rod or bed-plate slidably supported by the yokes and adjustable towardeither of the attrition-disks, a shaft slidably-journaled on the rod orbed-plate, an abrading-wheel carried by the shaft, a feed-screw mountedon the rod or bed-plate, and means connecting the shaft with thefeed-screw whereby the abrading-wheel may be adjusted across the face ofeither of the attrition-disks.

7 In a device of the character described, a bed-plate, means thereon forconnecting with opposite sides of opened disk-cases of anattrition-mill, supports on the bed-plate, a shaft slidably journaled inthe supports, an abrading-wheel carried-by the shaft, means for rotatingthe shaft, and means for moving the shaft longitudinally to cause theabradingwheel to travel over the face of one of the grinding-disks ofthe attrition-mill.

8. In a device of the character described, a rod or bed-plate, means forsecuring the rod or bed-plate to opposite sides of the opened diskcasesof an attrition-mill, supports mounted.

on the rod or bed-plate, a shaft slidably journaled in the supports, anabrading-Wheel carried by the shaft, means for rotating the shaft, amember having connection with the shaft but locked against independentlongitudinal movement thereon, and a feed-screw supported from the rodor bed-plate and threaded in the said member and adapted to cause theabrading-wheel to travel over the face of one of the grinding-disks ofthe attrition-mill.

9. In a device of the character described, a rod or bed-plate, means forsecuring the rod or bed-plate toopposite sides of the opened diskcasesof an attritionmill, supports mounted on the rod or bed-plate, a shaftslidably journaled in the supports, an abrading-Wheel carried by theshaft, means for rotating the shaft,

a yoke member having loose connection-with the shaft, stops-on the shaftto prevent longitudinal movement of the yoke thereon, said yoke having asliding connection with the rod or bed-plate, and a feed-screw mountedin a bearing on the rod or bed-plate and threaded in one of the arms ofthe yoke.

10. In a device of the character described, a rod or bed-plate, meansfor securing the rod or bed-plate to opposite sides of the openeddiskcases of an attrition-mill, supports mounted on the rod orbed-plate, a shaft slidably journaled in the supports, an abrading-wheelcarried by the shaft, means for moving the shaft longitudinally, anelongated pulley on the shaft, and a belt driven from the shaft of theattrition -mill and passing around the elongated pulley.

11. In a device of the character described, a rod 'or bed-plate, meansfor securing the rod or bed-plate to opposite sides of the openeddiskcases of an attrition-mill, supports mounted on the rod orbed-plate, a shaft slidably journaled in the supports, an abrading-Wheelcarried by the shaft, means for moving the shaft longitudinally, anelongated pulley on the shaft, an adjustable bracket supported by therod or bed-plate. idler-pulleys carried thereby, and a belt driven fromthe shaft of the attrition-mill and passing over the idler-pulleys andaround-the elongated pulley.

In testimony whereof I aflix my signature in presence of two witnesses.

EDWARD P. ALSTED.

Witnesses:

JNo. S. GREEN, ANNA F. SCHMIDTBAUER.

